Put your intensity where results can actually feel it.

A lot of effort gets spent where it cannot register. Arguing about a decision already made, perfecting a detail nobody depends on, worrying at a situation you have no lever on. The intensity is real and the outcome never feels it, which is exhausting in a way that hard, useful work is not.

Take the thing you have been pouring energy into and ask which specific result would change if you doubled that effort. If nothing would, move the effort. There is almost always a nearby place where the same force actually moves something.